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题名: Dynamics of Excited o-Dichlorobenzene
作者: Li Xiao-Ying1;  Wang Li2;  Wang Yan-Qiu3;  Song Zhe1;  Liu Ben-Kang3
关键词: o-Dichlorobenzene ;  Vibrational excitation ;  Photoelectron imaging ;  Photoelectron kinetic ;  energy spectrum
刊名: ACTA PHYSICO-CHIMICA SINICA
发表日期: 2015-09-01
DOI: 10.3866/PKU.WHXB201506291
卷: 31, 期:9, 页:1655-1661
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: The dynamics of the first excited singlet electronic state (S-1) of o-dichlorobenzene was investigated in real time by the femtosecond pump-probe method combined with time-of-flight mass spectroscopy and the photoelectron velocity mapping technique. The lifetime of the S-1 vibrational ground state was determined experimentally to be (651 +/- 10) ps, corresponding to the intersystem crossing process from the S-1 state to the triplet state. Two decay channels were found in the S-1 vibrationally excited mode 9a(2)18a(2). The fast process (lifetime constant (458 +/- 12) fs) is because of the internal conversion from the S-1 vibrationally excited mode to the highly vibrationally excited ground state (S-0). The slow process (lifetime constant (90 +/- 10) ps) is attributed to the intersystem crossing process from the S-1 state to the triplet state (T-1). Photoelectrons with long lifetime characteristics in the spectrum might be connected with the intersystem crossing process. Enhanced spin-orbital coupling in the S-1 highly vibrationally excited state accelerates the intersystem crossing process.
关键词[WOS]: SHELL ELECTRONIC-STRUCTURE ;  LASER MASS-SPECTROMETRY ;  MULTIPHOTON IONIZATION ;  PHOTODISSOCIATION DYNAMICS ;  PHOTOIONIZATION DYNAMICS ;  ULTRAFAST DYNAMICS ;  MOLECULAR-OXYGEN ;  PICOSECOND LASER ;  ARYL HALIDES ;  266 NM
语种: 英语
WOS记录号: WOS:000362144700003
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146570
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Liaoning Normal Univ, Sch Phys & Elect Technol, Dalian 116029, Liaoning Provin, Peoples R China
2.Dalian Nationalities Univ, Coll Phys & Mat Engn, Dalian 116600, Liaoning Provin, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Liaoning Provin, Peoples R China

Recommended Citation:
Li Xiao-Ying,Wang Li,Wang Yan-Qiu,et al. Dynamics of Excited o-Dichlorobenzene[J]. ACTA PHYSICO-CHIMICA SINICA,2015,31(9):1655-1661.
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